Designated verifier multisignature schemes based on ElGamal scheme
Li Su · Computer Engineering and Applications Journal · 2007
Publicly verifiable multisignature makes the leakage of information,which is harmful to information security.Designated verifier multisignatures are privacy-oriented signatures that provide message authenticity only to specific receiver,which is suitable for some specific conditions.The paper proposes two designated verifier multisignature schemes based on ElGamal algorithm and designated verifier signature.One is a verifiably sequential multisignature,the other is a broadcasting multisignature.These multisignature schemes have the attribute of specified receiver,can avoid the leakage of information of both receiver and signatures,and resist forgery and coalition.The size of signature does not increase with signer number.These two schemes ensure the security of receiver and signatures.